Locomotive boiler



July 7, 1931. E. J. NOEL LOCOMOTIVE BOILER,

Filed Sept. 16, 1929 3; as taken on the line 22 of Fig. 1.

Patented July 7, 1931 PATENT oF icE v UNITED STATES ERNEST J. NOEL OF IRoN'roN, OHIO, AssIGno-It 'ro Looo'Mo'rIvE FIREBOX COMPANY,

or CHICAGO, ILLINOIS, n CORPORATION or DELAWARE I Looo o'rIvE BOILER I Application filed September 16, i929. Serial No. 392,979.

This invention'relates to improvements in locomotive boilers and it consists of the mat- 1 ters hereinafter described and more par ticularly pointed out in the appended claims.

In locomotive boilers having a firebox of the combustion type and in which it isfdesired to installladditional water steaming and circulating element as for instance the well known Nicholson thermic siphon, ob-

stacles are presented to the forming ofan with the front water leg, which wall is high enough to receive the inlet end of a siphon without bringing the same into dIIGCt'OOII- tact with the fuel burning upon the grate.

This object of the invention as wellfas others together with the manyiadvantages thereof,- will more fully appear asI proceed with my specification. I

Inthe drawings Fig. 1 isa longitudinal vertical sectional no view through a locomotive boiler of the combustion chamber type embodying my invention.

' Fig. 2 is a transverse vertical sectional view on an enlarged scale through the same Referring now in detailto the locomotive firebox, illustrated in the accompanying drawings, the same includes a combined fire and combustion chamber which extends I 41 from the back sheet 1 to the flue sheet 2 and from one to'the other of theside sheets 33. The top of the firebox is'formed by a crown sheet 1. 5 indicates the inner front throat and extending from the, flue sheet the crown sheet, its sides 7 are formed byend parts or continuations of the sidesheets and so its bottom is formed byfa horizontal wall sheet is the boiler shell 13.

terior of thezfirebox to the smokebox I manner 'well known. I

A suitable distance to the rear ofthe front water leg or throat 1 1 I provide an upright l'transverse water wall: indicated as a whole by the numeral20 in F i g. 1. "This water ends into the S'that' merges into said "sides 7 In in- 7 stance thebottom 8 .of thecombustion chamber extends from the flue sheet to saidcinner front throat sheet 5 in the manner usual in fireboxes of this kind. a

The fireboxjust described is enclosed by a top sheet 9 and outer side sheets 1010, an 7 outside front'throat sheet 11, and an outside back plate 12 that provides the wrapper for said firebox and connected to said top sheet, outer side sheets and outside throat The several sheets just above mentioned, together with the various sheets of the firebox define the several waterlegs of the boiler; namely, the,

by a mud ring '16. The. several coacting -sheets'are connected together by means of :stay bolts. 17;

In the inner and outer back I acting flanges to provide the fuel dooropenmg 18 and connected to thefiue sheet within sheets, are cothe shell'are the fiues 19 through whichfthe r products of oombustionpass from the-inwallcompr'ises front and rear sheets 21 and inthe 22 which areconnected together atthe top I by a rounded top wall 23- and the bottom 'ends ofisaid'sheets are connectedto a cross bar 24 forming a part of the'mud ring. The

mid portion of the waterwall isof a height I less than the end portions thereof as shownin vFig. .2 and said end portions have flanges 25 adapted to seat in openings in the side sheets of the firebox and be secured thereto by welding. Thus this water wall whichis closed at its top'and bottom opens at'both side water legs 14 of the boiler.

isthe usual fuel receiving grate as indicated water leg 13and said waterwall th bottom;

thebottom of; the. firexchamber, between the back leg 15 and the water wall 20 I by the dotted line-26 and between thejfront K 65 front legor throat 14, the side legs 14 and back water leg 15 all closed at thebottom of the fire chamber is closed by a wall 27 having an opening and door 28 therein whereby the combi'lstion chamber is accessible for inspection and clean out purposes.

In connection with. the structure thus far described I may employ one or more sets of water steaming and circulating elements arranged either tore or aft the water wall or both fore and aft the same and this last mentioned arrangement is best shown in Fig. 1.

The water steaming and circulating elements employed herein constituted what have now become known as the Nicholson therinic siphon and when a plurality of such siphons are employed in both the fire and combustion chambers, those in the combustion chambers are disposed in plane between those in the fire chamber. Such. elements may be of the shape orform desired but they all embody the same basic parts; namely, a flat substantially triangular body that opens through the crown sheet and a tubular neck opening into the transverse water wall 20.

The siphons in the fire chamber are each indicated as a. Whole by the numeral 30 and the siphons in the combustion chamber are each indicated as a whole by the numeral 29. In each instance however the siphons each includes a substantially triangularly shaped. flat hollow body 31 suitably stay bolted and a tubular neck Each body is open at its top and is flanged for welding in a longitudinally extending slot in the crown sheet in the usual manner.

The neck 32 of each siphon 30 in the fire chamber is engaged and welded in a flexible diaphragm 33 formed in the rear sheet 22 of the water wall 20 while the neck 32 of each siphon in the combustion chamber is engaged in a flexible diaphragm 34 formed in the front sheet of said water wall in a plane below that of the diaphragms in the rear sheet of the water wall. In each sheet of the water wall, in line with the respective diaphragms therein are outwardly convened dish portion 35 whereby even though th diaphragms extend into said wall, the width thereof in the plane of the inlet necks is in no manner reduced. The opposed sheets of the Water wall are stay bolted together to resist internal pressures.

In the operation of the boiler, water enters the water wall from each side water leg of the boiler and then enters the respective inlet necks of the several siphons. The temperature of the water in the siphons is raised whereby a part is generated into steam to increase circulation thereof so that part of said water is discharged above each end of the crown sheet. Thus even though the water line in the boiler falls below normal, the high end of the crown sheet will always be flooded with water.

As the transverse water wall draws water from the bottom end of each side water leg, a fore and aft circulation is produced in said water leg which sweeps the mud ring clean and prevents the accumulation of sediment in the bottom ends of the water legs.

lVhile in describing my invention, I have referred in detail to the form arrangement and construction of the several parts thereof the same is to be considered merely as illustrative so that I do not wish to be limited thereto except as may be pointed out in the appended claims.

I claim as my invention 1. A locomotive boiler embodying therein a firebox having a tire chamber and a combustion chamber, an upright transversely disposed water wall spaced rearwardly from the front throat of the boiler and communicating at its ends with the side water legs only of the boiler and a siphon in each of said chambers and opening at one end through the crown sheet and opening at its other end. into said water wall.

2. A. locomotive boiler embodying therein a firebox having a fire chamber and a combustion chamber, an upright transversely disposed water wall spaced rearward from the front throat of the boiler and communicating at its ends with the side water legs only of the boiler, a plurality of siphons in the lire chamber and combustion chamber respectively, aeh siphon including a discharge end opening through the erown sl set and an inlet end opening into said transverse water wall, the inlet necks of the siphon in the combustion chamber opening into, said water wall in a plane below that of the necks of the siphons in the fire chamber.

In testimony whereof, I have hereunto set my hand this 9th day of Sept, 1929.

E. J. NOEL. 

